Oracle 1Z1-922 Dumps - 100% Cover Real Exam Questions (Updated 360 Questions)
Real 1Z1-922 dumps - Real Oracle dumps PDF
NEW QUESTION # 190
Which command is used to configure MySQL Enterprise Audit to start logging database events?
- A. GRANT AUDIT ON *.* TO 'audit_user';
- B. INSTALL PLUGIN audit_log;
- C. CREATE AUDIT TRAIL FOR 'audit_user';
- D. SET audit_log_enable = ON;
Answer: B
Explanation:
To enable MySQL Enterprise Audit, the audit log plugin must first be installed with the INSTALL PLUGIN audit_log; command. This plugin logs various database events, such as user logins and queries.
NEW QUESTION # 191
How can you disable a user account in MySQL without deleting it?
- A. By issuing ALTER USER 'user'@'host' ACCOUNT LOCK; BCy. issuing REVOKE ALL PRIVILEGES FROM 'user';
- B. By removing all privileges from the user
Answer: A
Explanation:
The ALTER USER 'user'@'host' ACCOUNT LOCK; command locks a MySQL user account, preventing the user from logging in without deleting the account itself. This is a good option for temporarily disabling a user.
NEW QUESTION # 192
How does MySQL InnoDB Cluster achieve scalability?
- A. By sharding data across multiple nodes
- B. By improving query performance with indexing
- C. By distributing write queries across all nodes
- D. By adding read replicas to handle increased read traffic
Answer: D
Explanation:
MySQL InnoDB Cluster can achieve scalability by adding read replicas that handle read queries, distributing the workload and reducing the pressure on the primary server. Write operations are still handled by a single primary server.
NEW QUESTION # 193
What does the log-bin setting enable in MySQL?
- A. Writing binary logs for replication
- B. Caching of SELECT queries
- C. Enabling transaction logs
- D. Storing binary data in tables
Answer: A
Explanation:
The log-bin setting enables binary logging in MySQL, which is essential for replication. The binary log records all changes to the database and is used to synchronize replicas with the primary server.
NEW QUESTION # 194
Which replication topology is best suited for consolidating data from multiple sources into a single replica?
- A. Multi-source replication
- B. Circular replication
- C. Group replication
- D. Multi-primary replication
Answer: A
Explanation:
Multi-source replication allows a single replica to receive data from multiple primary servers. This is ideal for consolidating data from various sources into a single, unified replica.
NEW QUESTION # 195
Which of the following allows a user to execute stored procedures in MySQL?
- A. INSERT privilege
- B. RELOAD privilege
- C. EXECUTE privilege
- D. SELECT privilege
Answer: C
Explanation:
The EXECUTE privilege allows users to execute stored procedures and functions within the MySQL database.
NEW QUESTION # 196
What is the purpose of the InnoDB undo log?
- A. To store data modifications made by SELECT statements
- B. To track uncommitted changes and allow rollback if needed
- C. To store query results for future reference
- D. To ensure data replication between master and slave servers
Answer: B
Explanation:
The InnoDB undo log stores uncommitted changes, allowing transactions to be rolled back if necessary. This ensures consistency and atomicity in the transaction lifecycle.
NEW QUESTION # 197
In MySQL Group Replication, what happens when a primary server fails?
- A. The failed primary server is automatically replaced by another server
- B. The replica continues serving traffic
- C. Replication stops until the primary is restored
- D. All transactions are rolled back
Answer: A
Explanation:
In MySQL Group Replication, if the primary server fails, the group automatically selects a new primary server, ensuring continuous availability without manual intervention.
NEW QUESTION # 198
Which MySQL feature is specifically designed to handle read scaling in a MySQL InnoDB Cluster?
- A. MySQL Router with read/write split
- B. Multi-primary replication
- C. MySQL Query Cache
- D. Asynchronous replication
Answer: A
Explanation:
MySQL Router can be configured to handle read/write splitting, directing read queries to replicas and write queries to the primary server. This improves read scaling in a MySQL InnoDB Cluster.
NEW QUESTION # 199
Which InnoDB parameter controls the frequency of disk flushes to ensure data durability?
- A. innodb_flush_log_at_trx_commit
- B. innodb_log_file_size
- C. innodb_flush_method
- D. innodb_max_dirty_pages_pct
Answer: A
Explanation:
The innodb_flush_log_at_trx_commit parameter controls how often the InnoDB log is flushed to disk. Setting it to 1 ensures that logs are flushed after every transaction commit, ensuring data durability.
NEW QUESTION # 200
Which of the following is a key scalability feature of the HeatWave Cluster?
- A. Automatic query optimization
- B. Automatic failover for transactional workloads
- C. Support for multiple databases
- D. Linear scaling with the addition of more nodes
Answer: D
Explanation:
A key feature of the HeatWave Cluster is its ability to scale linearly. As more HeatWave nodes are added, the performance of analytical queries improves proportionally, making it highly scalable for large datasets and workloads.
NEW QUESTION # 201
How would you allow a user to connect from any host in MySQL?
- A. Grant privileges with 'user'@'%'
- B. Grant privileges with 'user'@'all_hosts'
- C. Grant privileges with 'user'@'localhost'
- D. Grant privileges with 'user'@'*.*'
Answer: A
Explanation:
The @'%' in MySQL user creation allows a user to connect from any host. This is often used when users need to connect from multiple different servers.
NEW QUESTION # 202
What does the SELECT privilege allow a user to do in MySQL?
- A. Update existing records
- B. Create new databases
- C. Insert new records
- D. Read data from tables
Answer: D
Explanation:
The SELECT privilege allows users to retrieve or read data from tables. Users can run queries that fetch data, but they cannot modify, insert, or delete data unless they have the appropriate privileges.
NEW QUESTION # 203
What makes HeatWave particularly suitable for real-time analytics?
- A. It stores query results on disk for future use
- B. It optimizes transactional queries for consistency
- C. It reduces the size of the binary logs
- D. It executes queries directly in memory, avoiding disk I/O
Answer: D
Explanation:
HeatWave is suitable for real-time analytics because it processes queries in-memory, which eliminates the need for disk I/O, significantly reducing query execution time for large datasets.
NEW QUESTION # 204
What is the purpose of the binary log in MySQL?
- A. To monitor database performance metrics
- B. To log user activities and queries
- C. To optimize queries by caching execution plans
- D. To store all changes made to the database for recovery and replication
Answer: D
Explanation:
The binary log in MySQL records all changes made to the database, including inserts, updates, and deletes. It is primarily used for replication and recovery.
NEW QUESTION # 205
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